Member nodes in hierarchy configuration dialog loaded eagerly.

[mysticfall]

Member nodes in the hierarchy configuration dialog are loaded eagerly, even though the 'dynamic' property of the Tree component is set to 'true', which incurrs significant performance overhead especially with large number of descendent child nodes.

It's caused by a PrimeFaces issue which I've reported some months ago :

• https://code.google.com/p/primefaces/issues/detail?id=6100

As it's such a big hindrance for usability, we should apply a workaround immediately before it was fixed in PrimeFaces itself.

• Relevant forum post : https://groups.google.com/forum/#!topic/pivot4j-list/SsiHqxW8HCM